Valve mechanism for motors.



A. F. SCHMIDT.

VALVE MECHANISM FOR MOTORS. APPLICATION FILED MAR.13, 1912.

1,103,087. Patpnted July 14,19M

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A. F. SCHMIDT.

VALVE MECHANISM FOR MOTORS.

APPLIGATION FILED MAR.13, 1912.

1,103,087. Patented July 14,1 14.

3 SHEETS-SHEBT 2.

VIVITNESSES.75 I fl. Max:177 Jowf ml CL.

A. F. SCHMIDT.

VALVE MECHANISM FOR MOTORS.

' APPLICATION FILED MAR. 13, 1912.

Patented July 14, 1914,

3 BEEETS-SHEET 3.

WITNESSES.

; UNITED STA ES PATENT. OFFICE;

- AUGUSTUS F. SCHMIDT, OF PITTSBURGH, PENNSYLVANIA.

4 of Pittsburgh, in the county VALVE MECHANISM FOR MOTORS.

Patented July 14., 1914..

Specificationof Letters Patent.

Application filed March 13, 1912. Serial No. 683,643.

To all whom it may concern:

Be it known that I, AUGUSTUS F. SCHMIDT, a citizen of the United States,and resident of Allegheny and State of Pennsylvania, have invented a newand useful Improvement in Valve Mechanism for Motors; and I do herebydeclare the following to be a full, clear, and

exact description thereof.

My invention relates to rotary mechanism for motors.

The main object of my invention is to provide rotary valve mechanism inWhlCh there is a quick opening and closing of the ports while at thesame time a comparatively valve slow motion is imparted to the rotatingparts.

Another object of my 1nvent1on is to provide for the cooling of a rotaryvalve sleeve on the inside as well as outside.

To these ends my invention comprises the novel features hereinafter setforth and claimed.

In the accompanying drawings Figure 1 is a longitudinal section'takenthrough the exhaust valve, the remaining parts of the motor being shownin full lines. Fig. 2 is an end elevation. Fig. 3 is a vertical sectionthrough the cylinder and cross-section through valves. Fig. 4 is a viewof one of the valves partly broken away. Fig. 5 is across-section of oneof the valves; Fig. 6 is a detail showing the end bearing for the rotarysleeves; and Fig. 7 shows a modified form ofmy invention.

In Figs. 1, 2 and 3 of the drawings, I

i have ,illustratedmy invention in connection i to the crank-shaftbv'the cranks 5- and 6,

The upper ends of the piston-rods are connected to the pistons 7 and 8contained Within the cylinders 9 and 10, respectively. The cylinders mayall be cast in one piece if desired and this casting'is formed with theT-head 11 with the bores 12 at each side of the cylinders. These bores12 are surrounded b the outside water-jackets 13 and on the lnside bythe water-jackets 14. The

' cylinders are provided with the intake ports 1 5 and the ex aust ports16.

I will first describe the rotary-sleeve.mech-- anism for controlling thesupply of gaseous directions.

fluid to the cylinder, and this is. the valve mechanism on theleft-hand'side' of the cyl inder as shown in Figs. 2 and 3. The mech- Yanism, however, for the exhaust side is iden-' tical. Within the bore 12is the inner rotary valve 17 which consists of a hollow sleevesurrounding the inner concentric core-piece 18 provided with the waterjacket 14 connecting with water-jacket 13 by means of cap 19. Thishollow valve sleeve 17 is provided with ports 20 arranged apart, theports leading to one cylinder being staggered with reference to thoseleading to the other cylinder, as shown in Fig. 4. The outer rotaryvalve sleeve 21 fits around the inner sleeve 17. Each of'the sleeves 17and 21 have the annular grooves 22 at their inner ends to'receive the,balls 23 carried by the annular ball-race 24 which' is contained withinthe bore 12, and is held therein by the annular retainer 25 formed aspart of the head 19 which is secured to the casting forming thewater-jacket, the same as shown at Fig. 4 in connection with the exhaustvalve. The core-piece 18 has the ports 27 and 28. The port 27 is theport through which.

the explosive fluid passes to the cylinder.- A pipe 29 is connected upto the core-piece 18 said pipe leading from a suitable carburetor.

The outer end of the valve sleeve 17 has the threaded seat 30 inwhich-the stud 31 is secured. A work-wheel 32 is keyedto the stud 31 andis held in place by the nut 33. The worm-wheel 32 has formed therein thebevel pinion 34. The bevel pinion 34 meshes with the bevel pinion 35 onthe stud-shaft 36 journaled in the casing. This pinion 35 'mesheswit-lithe internal bevel gear 37 which is secured to the outersleeve 21by the screws 38. I

A worm 39 is carried by the vertical shaft 40 and said worm meshes withthe worm wheel 32.- The shaft'40 is provided 'at its lower end with thebevel pinion 41 which loo is engaged by the bevel pinion 42 on thecrank-shaft 3. The gear connections be tween the crank-shaft 3 and theinner and outer valve sleeves" are so adjusted that the valve sleeveswill make a quarter revolution to each revolution of the crank-shaft.

Furthermore it is apparent from the above I described gearing that therotary valve sleeves 17 and 21 will be'driven in opposite Theabovemechanism is shown in connection' with the exhaust'valvel Fig.

' 1, but this construction applies equally well to the inlet valve.Theouter valve sleeve" 21 is also provided with orts 43 whlch correspondto the ports 200 the inner valve sleeve and said ports are adapted toregister at the intake port as indicated in. Fig. 3 or upon each quarterof said valve.

- Itwill be unnecessary to describein detail'the valve mechanismcontrolling the exhaust 16, as it is-a duplicateof that described inconnection with the valve controlling the intake, and the same referencenumerals areemployed on like parts, such as 17 18, 20 etc. The same worm39 opcrates both valves, the only point of differencebeing that therotary sleeves of the ex- ,haust valves are set so as to open theexhaust port when the intake is closed as indicated in Fig. 3; Theexhaust side has the pipe 47' connected'up thereto for carrying ofl-theexhaust gases; The valve casings are passages 44:, 44 When it is desired{28 into-the intake port 15. The exhaust side h'as the port 48in thecore-piece 18 which 49 leading'from the cylinder, so that when thepiston passes below the port 48 the is brought into'connection with theby-pass exhaust can beginto'take place before the I cylinder casting.-

piston begins toascend. A cooling-jacket 50 is provided for theby-pass'et9 in the From the above it will be apparent that the valvescontrolling'the intake will make broughtinto coincidence on the aquarter revolution to each revolution of the crank shaft, and as saidvalve sleeves rotate in opposite directions, they will be quarter, andthis will occur at the intake valve 15 where H the gaseous fluid isdelivered to the upper end of the cylinder. It is apparent that by:having the valves rotating in opposite directions the full opening ofthe ports will take place quicker than where a single plug valve isemployed, and furthermore there also will be a quicker closing of theports.- ..This also permits the valves to have their .ports open thefull width for a longer 1 period.

In Fig. 7-1 have shown another modified form of my invention in whichthe cylinder .is provided with the valve casings 71 at I each sidethereof and at one side is the valve .mechanism controlling the inletport 72 and at, the other side is the valve mechanism controlling theexhaust 73. In this construction only one rotary sleeve 74 is employedprovided with ports 75. The central 1 core-piece @5 fluid is admitted tothe central chamber 77 76 is stationary and the gaseous 7 8 is broughtinto register with theports by the rotation of the valve sleeve 74 sothat at the time of the admission of the charge limit it to thisparticular type as it maybe applied to steam-engines as well.

What Iclaim is:

1. The combination of a cylinder, a'casing, an inner rotary valve sleevein said casing, an outer rotary valve sleeve in said casing, astationary core-piece within said inner sleeve, said stationarycore-piece having a passage therein, said sleeves having ports and meansfor rotating; said sleeves inopposite' directions whereby the ports insaid sleeves are adapted to register with a port in said cylinder'andwith a port in said core leading to said passage to form communicationbetween said cylinder and said passage. I

2. The combination of a cylinder, a casing, a rotary valve sleeve insaid casing, a core within said sleeve having a passage therein and aport in communication therewith, means for admitting gas to saidpassage, means for cooling said core piece, said sleeve having a, portadapted to register with a port leading to said cylinderand with theport in said core piece, and means for rotating'said sleeve. 3

3. The combination of a cylinder, a i? ing, a rotary valve sleeve insaid casing having ports adapted to register. with a port in saidcylinder, a stationary core-plece withv v .in said rotary sleeve havingan exhaust passage, said exhaust passage communicating with saidcylinder when said ports are in register, said core-piece having'a 'portcommunicating with said passage, and said cylinder having a port at thelower end communicating with said passage.

4. The combination of a cylinder,'a piston, piston rod, crank shaft, aninner rotary valve sleeve having ports, a worm wheel connected to saidvalve sleeve, an outer rotary valve sleeve having ports adapted tocoincide with the ports of said first mentioned sleeve, connectionsbetween said worm wheel 'and said outer rotary sleeve, and between saidinner rotary sleeve and said wormwheel to rotate said inner sleeve in anopposite direction, a worm engaging said worm wheel, a vertical shaft onwhich said worm 1s mounted, and connectlons beg tween said verticalshaft and crank shaft. whence itv escapes by the port 7 8. This -port 5.The combination of a cylinder, a pisv a vertical shaft supporting apiston rod, crank shaft, an inner rotary valve sleeve having ports, aworm wheel connected to said valve sleeve, bevel gearing on said WormWheel, a bevel pinion engaged by said gear, an outer rotary valve sleevehaving ports, a bevel pinion carried thereby engaged by saidintermediate bevel pinion, a worm engaging said worm wheel,

said shaft, conshaft and said ton,

nections between said crank vertical shaft.

6. The combination of a cylinder having a port, an outer valve casing aninner valve casing, rotary valve sleeves between said casings havingports, means for rotating said valve sleeves in opposite directions,said outer casing having a passage coinciding with a passage in saidinner casing in line with the port leading into said cylinder and acover plate on said outer casing closing said passage.

7. The combination of a cylinder, a casing, an inner rotary valve sleevein said casing, an outer rotary valve sleeve in said casing, astationary core Within said inner Copies of this patent may be obtainedfor five cents each, by addressing the sleeve having a passage thereinand a port in communication therewith, means for cooling saidcore-piece, said sleeves having ports adapted to register with a portleading to said cylinder and with the port in said corepiece, and meansfor rotating said sleeves in opposite directions. 7

8. The combination of a cylinder, a casing, an inner rotary valve sleeveinsaid casing, an outer rotary valve sleeve in said casing, a stationarycore-piece having a passage therein and a port in communicationtherewith, said core-piece having a cooling chamber, said sleeves havingports adapted to register with a port leading to said cylinder and Withthe port in said core-piece, and means for rotating said sleeves inopposite directions.

In testimony whereof, I, the said Aneus'rus F. SCHMIDT, have hereuntoset my hand.

AUGUSTUS F. SCHMIDT' Witnesses:

ROBERT 0. Torrent, J OHN F. WILL.

Commissioner of Patents.

Washington, D. 0.

